<?php

namespace My\App\Tests;

use My\App\PdfCreator;

class PdfCreatorTest extends \PHPUnit_Framework_TestCase
{
    use \phpmock\phpunit\PHPMock;

    /**
     * @test
     * @expectedException \RuntimeException
     */
    public function executeReturnsAnExceptionOnFailure()
    {
        $exec = $this->getFunctionMock('My\App', 'exec');
        $exec->expects($this->once())->willReturnCallback(
            function ($command, &$output, &$returnValue) {
                $this->assertEquals('/usr/bin/wkhtmltopdf file.html file.pdf', $command);
                $output = ['failure'];
                $returnValue = 1;
            }
        );

        $pdfCreator = new PdfCreator;
        $pdfCreator->execute('file.html', 'file.pdf');
    }
}